Master Bootloader Bug in Alpha Snapshot

We’ve discovered a bug that prevents a newly installed system from booting if you uncheck both the “Install PC-BSD bootloader” and the “Partition with GPT for full disk install” check boxes in the Disk selection screen of the alpha snapshot. The error will not occur if either (or both) of these boxes are checked. This bug has been fixed for the next alpha snapshot; for now, check at least one of those boxes if you are testing the current snapshot.